djvu | b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601

General

Target

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
Size

716KB
MD5

ed7ad480d60d0e5788e20bbdc292643e
SHA1

704ffc256ecfa1ea9d11811ffab5e5bb5e21ca84
SHA256

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601
SHA512

d77366c4f056148948f0f711935aaf95e647e9d85b3c562eafe5187834adb87e7f7c405dd35a8782d61eb1a503197d21e020577a26675c2f9eba45a25132725c
SSDEEP

12288:w3nDE3q0eoovfMB0jF5oWmOXIGVSgy2a5+ISFdGg481OIJQ8neK:w343qjoic4FhmO4oSbUFDbOIJ

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://cajgtus.com/test2/get.php

Attributes

extension
.vehu
offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
payload_url
http://sdfjhuz.com/dl/build2.exe

http://cajgtus.com/files/1/build3.exe
ransomnote
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rsa_pubkey.plain

Signatures

Detected Djvu ransomware 15 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3196-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp	family_djvu
behavioral2/memory/2128-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2128-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2128-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2128-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2128-19-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-22-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-27-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-28-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-32-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-34-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-35-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-36-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral2/memory/2636-37-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Modifies file permissions 1 TTPs 1 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exe

pid process

1436 icacls.exe

pid	process
1436	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\17d991ae-3f0e-4214-ab71-1276d61c4527\\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe\" --AutoStart"	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 api.2ip.ua
6 api.2ip.ua
1 api.2ip.ua

flow	ioc
2	api.2ip.ua
6	api.2ip.ua
1	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

description	pid	process	target process
PID 3196 set thread context of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 set thread context of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

pid	process
2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
2636	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
2636	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exeb670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3196

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe"
2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2128

C:\Windows\SysWOW64\icacls.exe
icacls "C:\Users\Admin\AppData\Local\17d991ae-3f0e-4214-ab71-1276d61c4527" /deny *S-1-1-0:(OI)(CI)(DE,DC)
3⤵
- Modifies file permissions
PID:1436

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe" --Admin IsNotAutoStart IsNotTask
3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4592

C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
"C:\Users\Admin\AppData\Local\Temp\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe" --Admin IsNotAutoStart IsNotTask
4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2636

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

1

T1222

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
1KB

MD5
7bb5a14437331aad24915a3d8546fbc1

SHA1
9a5570c07af0c0cde02858f61e1c7094f5a70f38

SHA256
42397d9f3c8164d4cef19fc169d7bcea77a3ea7e9bcb8cfa7db2ff0bbd3a7e00

SHA512
a2333a078be981eafe3f666ff3944cd3b28279a9da99f354014d81d80e98a0effabff2a8f5ab5fba61f7de9e49e2af3112dda6b28678192a1d80d2ca22004f13

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize
410B

MD5
e15ab5686ac85d9b8ce755e2ed4027c9

SHA1
ecc4a99a5dff9fb790fbc2bfcf1a203b68700da9

SHA256
749c0b2acddce0d124199aea24e0eb7b50591c1872370c0d58e6b7091453ad71

SHA512
38d5f791fb234dfc4c34fea2503301b694a919c00dd3f16c60db6f04d2672aafc7dd6139f7f5c615febbcc0e4aeec14ce35ff90d159cf89cff34d3fdef3404de

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize
392B

MD5
66d2336c3a7b7809bd477c854aad6679

SHA1
a74ae8425f16788a1a4c5e8dd6e1cbce2d8cb1ed

SHA256
d018728d48ce91931e357f5cc16541c92dd93849d4a93c15f97bdc542f37efe9

SHA512
6db8d8069ba4bbd0aa5d06eebbc6d2dbdce219a0fd0eb34bdae10c36889d8ea54730c52479d830f4e5a65e1f9dec60b8fd8fb7693f7f4f983db14d03476ac487

Download Submit
C:\Users\Admin\AppData\Local\17d991ae-3f0e-4214-ab71-1276d61c4527\b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
Filesize
716KB

MD5
ed7ad480d60d0e5788e20bbdc292643e

SHA1
704ffc256ecfa1ea9d11811ffab5e5bb5e21ca84

SHA256
b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601

SHA512
d77366c4f056148948f0f711935aaf95e647e9d85b3c562eafe5187834adb87e7f7c405dd35a8782d61eb1a503197d21e020577a26675c2f9eba45a25132725c

Download Submit
memory/2128-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2128-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2128-19-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2128-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2128-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-22-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-27-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-28-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-32-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-34-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-35-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-36-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2636-37-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3196-2-0x0000000004AC0000-0x0000000004BDB000-memory.dmp

Filesize
1.1MB

Download
memory/3196-1-0x0000000004A20000-0x0000000004ABF000-memory.dmp

Filesize
636KB

Download

description	pid	process	target process
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 3196 wrote to memory of 2128	3196	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 2128 wrote to memory of 1436	2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	icacls.exe
PID 2128 wrote to memory of 1436	2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	icacls.exe
PID 2128 wrote to memory of 1436	2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	icacls.exe
PID 2128 wrote to memory of 4592	2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 2128 wrote to memory of 4592	2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 2128 wrote to memory of 4592	2128	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe
PID 4592 wrote to memory of 2636	4592	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe	b670a030d9df6e182a5a60217935c0e951b6326df75ea04ed575d8fe6ec95601.exe

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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Downloads